Balcony and Terrace Waterproofing: A Detailed Guide
Correct slope, membrane selection and drain detailing for balconies and terraces exposed to Nepal's monsoon rainfall.
Correct slope, membrane selection and drain detailing for balconies and terraces exposed to Nepal's monsoon rainfall.
Establish correct slope
A minimum 1:100 slope toward the drain outlet is essential — waterproofing membrane cannot compensate for reverse or flat falls.
Choose an exposed-use membrane
Balconies need UV-stable waterproofing systems rated for permanent sun exposure, unlike covered terrace areas.
Detail the drain outlet carefully
The junction between membrane and drain outlet is the highest-risk leak point and needs a proper collar detail.
Protect the membrane before tiling
A protection screed or bond breaker layer prevents tile installation from puncturing the waterproofing membrane below.
Use this in Build Mart Nepal
Turn the guidance into action by creating a project, loading a BOQ, matching local providers, issuing quotations and storing approvals in the Build Mart Nepal construction operating system.
Quick implementation checklist
- Define the required outcome and acceptance evidence.
- Assign an owner and target date.
- Record quotations, approvals and changes.
- Inspect completed work and retain handover records.
Build Mart Nepal Admin
Content Team · BuildMartNepal.com — Nepal's construction materials marketplace
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